Visara Master Console Center Installation User Manual

Page 44

Visara Master Console Center

Use the MVS command “D C” to see all the consoles that are currently
assigned. Enter this command from the MASTER console, or the console
on which the message indicating that a console was “backed up”
appeared. The “numbers” in the left-most portion of the line displays are
the console ids. The numbers that follow the “/” (if any) are the alternate
console ids. These are the ids of the console(s) that will be used to receive
messages if the console whose id (to the left of the “/”) fails. At the same
time, check the NBUF= value. A number that is in the hundreds or
thousands normally indicates a problem, especially if a “backed up”
message has appeared. It is the console with the high NBUF= value
whose id is required if opting for the “K Q” type recovery. Now, assuming
the console that is backed up has an id of 03, and the working console has
an id of 01, issue:

K Q,R=01,L=03

The messages that were backed up on console 03 will now be presented on
console 01. Earlier, we stated that issuing a VARY ONLINE was an easy
escape from the backed up problem. If you didn’t issue the VARY
ONLINE command prior to issuing the “K Q” command, try issuing it
after the “K Q” command. If a console is backed up, there must be some
sort of problem (for example, with a cable or controller). Issuing a VARY
ONLINE command causes the console to go “out of service”, and the
alternate console (if any) begins to receive the messages originally
destined for the out of service console. Issuing the “K Q” command
alleviates the problem, but it is likely that manual intervention will be
required to fix the problem. If so, the console should be put ONLINE (or
taken OFFLINE) until the problem is resolved, ensuring another backup
does not occur during problem resolution. Issuing the “K Q” prior to the
offline command guarantees that the messages that were backed up are
not be lost, assuming the R= console is available.